Press-mold.



C. R. BURKHARDT.

PRESS MOLD.

APPLICATION FILED SEPT. 1.1911.

Patented Jan; 919.

2 SHEETSS y mi To all whom it may concern:

' a citizen of the United States of America,

UNITED sTATEs PATENT OFFICE.

com: a. BURKHARDT,

OF TEANECK, NEW JERSEY, ASS IGNOR OF ONE-HALF TO JOHN A. i

SCHARWATH, 0F ELIZABETH, NEW JERSEY.

PRESS-MOLD.

Be it known that I, CURT R. BURKHARDT,

and a resident of Teaneck, Bergen county, and Stateof New Jersey, have invented certain new and useful Improvements in Press- Molds, of which the following is a specification, reference being had to the accompanyin drawings, forming a part thereof.

y invention relates to molds suitable for use in the manufacture of asbestos cement shingles, and like articles,jand has special reference to such asare intended for use in a press. Inn-1y copending application Serial No. 101,461 filed June 2, 1916, I have shown and described a hydraulic press particularly adapted for use in the manufacture of asbestos cement shingles.

One object of my invention is to provide a simple and improved mold suitable for use in 'a press of this character.

Another object is to provide a mold of the character above indicated, that shall be adapted to produce tapered shingles of uniform density without subjecting the press .to improper strams. 1

Another object, is to provide an asbestos cement shinglejhaving a taperedformation but at the same time ,havin a substantially uniform distribution of weight throughout its length. a

In order that my'invention may be thoroughly understood, 1 will now proceedto describe the same in the following specification, and then point out the novel features thereof in appended claims.

Referring to the drawings: Figures 1 and 2 are sectional elevations at right angles to each other, of' a press equipped with a mold which constitutes an embodiment of my invention.

' Figs. 3 and 4 are transverse sectional views at right angles to each other showing the mold and the press members drawn to a larger scale, Fig. 3 being taken on the line 3- -3. of Fig. 5. y

Fig. 5. is a partial plan, -view of the mold shown in Figs. 3 and 4, and

Figs. 6 and 7 are pe pective views of a by the mold illustrated in the previous fi an embodiment of my invention.

Referring to F'gs. land 2, 10 designates the base of the press Specification of Letters Patent.

"hereinafter explained.

' depended.

res and constitutes having a bottom flange Patented Jan. 1a, 1919.

1 Application'filed September 1, 1917: -Serial No. 189,405.

11 by which it is bolted or otherwise secured to the floor or foundation. 12 designates a plunger, 13 a stationary press head at the top, 14 and 15 removable moldsan'd' 16 and 17 side frames or racks'in which themolds are supported when not in the press.

The base has acylindrical recess 18 which constitutes a hydraulic cylinder in which operates'the cylindrical plunger 12. y

The plunger 12 has a press plate 20 which limits its downward movement and to which is secured-a press head 21 which constitutes the movable head of 'a press. of upwardly extending press blocks 22 which are adapted to cooperate with the mold as The'stationaryvpress head 13 is securely held in position by studs or heavy tie bolts 23 shown in Fig. 2. A pair of mold supports 24 are adjustably connected to the stationary press head 13 from which they are.

In the lower ends they are provided with slots 25 constituting guideways to cooperate with the mold. 26 or other suitable means is. employed for elevating the supportsto clamp the mold againstthe'stationary press head before the movable press head is actuated.

. Myl present invention is not concerned with the structure of the press apart from the mold and while I have shown a simple press having only one pair. of cooperating heads the molds of my invention are adapted to be used in a multiple arrangement in connection with presses such as that shown and described in my copending application to which reference has already been made, where the stationary movable press'heads Referring now to Figs. 3, 4 and 5, in addition to Figs. 1 and 2, the mold--14 comprises a frame 30 having side flanges 31 which cooperate'with the slots in the mold support, an intermediate partition 32 which divides the mold into two parts, and inwardly extending flanges 33 at the|bot tom of the frame.

The; partition 32 is enlarged at the bot tom to form flanges or ledges 34 which cor-- therewith in holdin -.a pair of removable mold blocks 35. hese blocks may be It has a pair that alarge number of molds may be received at onev time.

. respond to the flanges. 33, and cooperate I formed to constitute the mold surfaces, or

upwardly extending mold plates 36 may be mounted thereon as shown in Figs. 3 and 4. These plates are alike and each of them is tapered in thick to the other and has projections 37 which ne'ss from one end constitute cores to reduce the weight of the responding to the notches, in the shingle.

ably located at the line of overlap. In other material in ,the shingle.

The formation of the-niold 'plate will be apparent from the formation of the shingle as shown in Fig. 7.

thicker portionr of the The side walls of the mold are notched ati38-39' and the partition 32 is corre' 1s spondingly notched at 40-4=1. This is for the purpose of spacing the exposed portion of tile-shingle as it is laid on the roof.

the center of the shingle, their position cordesired position of the These are preferwords that portion of the shingle which is covered is laid edge to edge while the exposed portions are spaced apart. By forming the mold as above indicated,

Q I am vable to produce a pair of-identical shingles in each mold while at the same time the pressure on the press heads is such as to avoid any'tendency to'distortor'strain over the entire shingle and the material used in molding, this shingle the press u-r Furthermore, by disposin the core pro jections as indicated, I am a le to maintain a substantial uniform distribution of weight is subjected to uniform pressure with the result that a uniform and commercially. valuable product is obtained.

Variations in size "and arrangement of parts and, other modifications may be eflected within the spirit and scope of my inhaving a bottom flange, partition in the-center having lateral projectionsconstituting corresponding flanges,

v e plates 36 are reversed in position v and the' notches 38 and 40' are offset from consequently vention, and I intend only such limitations as are indicated in the appended claims.

What I claim is:'- o I 1. A press moldcomprising a mold frame and a transverse a'mold block removably mounted in each portion of the frame, and a pair of identical mold plates mounted in reverse position on therespective mold blocks.

2. A pressimold comprising a mold frame having ahbottom flange and .a transverse partition in-the' center having. lateral projections constituting corresponding flanges, a. mold block removably mounte in each portion of the frame, and a'pair of tapered mold plates r'eversely mounted on the respective mold blocks to produce a pair of tapered objects Without producing an out of line reaction when the press is operated. 1 3. A press mold for tapered shingles comprising a mold frame having a bottom flange, and a transverse partition in the center having lateral projections constituting corresponding flanges, a mold block removably mounted in each portion of the frame, and a pair of ress plates each tapered from end to end an having upwardly extending lugs or core rojections to reduce the weight of the thic (er portion of the shingle.

CURT R. BURKHARDT. 

